Great job on finishing it! Yeah the last level is a bit nuts, but if you've mostly stocked up on lives before that, it doesn't matter if you don't make it during that wave. Had to go a bit all out though for it :P.
It's a tricky one controls wise. For me it's a piece of cake now, and I can sail through most levels fine, I'm very in tune to them (obviously as I've played it loads while building). Some people found the game to hard and couldn't get to the end, others found it to easy.
I hoped added in the Free play mode would give people chance to play around a bit with it, but in Jam games most jokes don't want to play one game for too long anyway :P.
Anyway, thanks for playing and the feedback.